Chapter 3 - Managing the Information Systems Infrastructure and Services. C ompanies have to plan and manage their infrastructure needs to gain the greatest returns on their IS investments. The IS Infrastructure. The Is Infrastructure.

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The Internet and the World Wide Web (WWW) • The Internet is one of several Global Networks • The Internet has standard protocols • The Internet is based on Internetworking, or combining networks to form larger networks • The World Wide Web uses the Internet • The World Wide Web is not the Internet • The World Wide Web is • WWW protocols (ex: HTML& WWW URLs) • WWW Documents (e.g.: Web Pages) • WWW Domain Servers (translate URLs into IP addresses) • WWW Browsers

What Is Cloud Computing? • Cloud Computing is a way to allocate resources much like a utility sells power • Resources are used “on-demand”, as needed • Customers only pay for what they consume • Resources can be rapidly allocated and reallocated • Consumption becomes an operating expense • % Utilization and Efficiency increase dramatically

Linux: Operating System • Linux is developed collaboratively, meaning no one company is solely responsible for its development or ongoing support. • This spreading of development burden amongst individuals and companies has resulted in a large and efficient ecosystem and unheralded software innovation. http://www.linux.com/learn/new-user-guides/376-linux-is-everywhere-an-overview-of-the-linux-operating-system

Linux: Where is it used? http://www.linux.com/learn/new-user-guides/376-linux-is-everywhere-an-overview-of-the-linux-operating-system

Assembly Language An assembly language is a low-level programming language for a computer, or other programmable device.

Middleware • A computer software that provides services to software applications beyond those available from the operating system. It can be described as "software glue".[Middleware makes it easier for software developers to perform communication and input/output, so they can focus on the specific purpose of their application.

Data Buffer • A Data Buffer is a region of a physical memory storage used to temporarily store data while it is being moved from one place to another.

Firewall • Afirewall is a software or hardware-based network security system that controls the incoming and outgoing network traffic by analyzing the data packets and determining whether they should be allowed through or not.

IP Convergence • IP convergence refers to the capability of the Internet to act as a single foundation for various functions. IP convergence allows companies to create a more mobile workforce. • A VPN helps maintain corporate security by separating business traffic from other Internet traffic -- Remote employees can use the Internet to access everything from corporate files to voicemail messages. http://computer.howstuffworks.com/ip-convergence1.htm